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Analog Devices Inc. LTC6908HS6-1#WTRPBF
- Part No.:
- LTC6908HS6-1#WTRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Programmable Timers and Oscillators
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LTC6908HS6-1#WTRPBF.pdf
- Description:
- 2X OUT OSC W/ SS MOD
- Quantity:
- Payment:
- Shipping:
Inventory:4,092
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Product details
Overview
LTC6908HS6-1#WTRPBF from Analog Devices is a precision resistor-programmable dual-output oscillator with complementary (0°/180°) phase outputs, ±10% spread spectrum modulation, 50kHz–10MHz frequency range, rail-to-rail CMOS outputs, and automotive-grade operation up to 125°C. It serves as a low-jitter clock reference for multi-phase switching regulators in high-reliability power systems.
For engineers reviewing the LTC6908HS6-1#WTRPBF datasheet, LTC6908HS6-1#WTRPBF pinout, LTC6908HS6-1#WTRPBF application, or LTC6908HS6-1#WTRPBF equivalent, key selection criteria include guaranteed –40°C to 125°C operation, SSFM modulation rate selection (fOUT/16, /32, /64), RSET-based frequency accuracy ≤±3.5%, 400µA typical supply current at 50kHz, and TSOT-23-6 package compatibility with space-constrained automotive PCB layouts.
Technical Context
The LTC6908HS6-1#WTRPBF implements a master oscillator architecture where fMASTER = 20MHz × 10k/RSET, divided by 2 to yield fOUT = 10MHz × 10k/RSET. Its internal pseudorandom noise (PRN) generator modulates IMASTER between 0.9×ISET and 1.1×ISET, producing ±10% frequency spreading centered on fOUT.
Phase output configuration is fixed to complementary (0°/180°) per the -1 suffix; MOD pin logic states (GND/floating/V+) select modulation rates of fOUT/16, fOUT/32, or fOUT/64. Outputs are muted for 64 cycles at startup, and internal 1-pole LPF ensures smooth frequency transitions compatible with switching regulator bandwidths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Frequency Range | 50kHz to 10MHz - set by single external RSET (20kΩ–2MΩ), enabling compact clock generation without crystals or PLLs |
| Frequency Accuracy | ≤±3.5% max over –40°C to 125°C - ensures stable timing across full automotive temperature range without calibration |
| Spread Spectrum | ±10% fixed bandwidth - reduces peak EMI by distributing energy across 20% of center frequency, improving EMC test margins |
| Supply Current | 400µA typical at 50kHz (V+ = 5V) - enables low-power operation in always-on automotive subsystems |
| Output Duty Cycle | 45%–55% over temperature - maintains precise edge alignment for synchronous rectification and gate drive timing |
| Start-Up Time | 260µs typical at 1MHz - ensures rapid system readiness after cold cranking or wake-up events |
| Temp Stability | ±40ppm/°C - minimizes frequency drift in under-hood environments with wide thermal gradients |
Pinout & Package
Package: 6-lead TSOT-23 (1mm height), RoHS-compliant, exposed pad grounded. Designed for high-density automotive PCBs with thermal performance θJA = 230°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive Supply Input | 2.7V–5.5V rail; requires local 0.1µF bypass to ground for noise immunity in noisy automotive environments |
| GND | Ground Reference | Low-impedance return path; exposed pad must be soldered to PCB ground plane for thermal and EMI control |
| SET | Frequency-Setting Input | Accepts resistor (20kΩ–2MΩ) from V+; internal 1.13V bias enables accurate RSET-based frequency programming |
| OUT1 | Primary Output | CMOS square wave, 50% duty cycle; drives SYNC/PLLIN pins of switching regulators (e.g., LTC3418) directly |
| OUT2 | Complementary Output | 180° phase-shifted copy of OUT1; enables interleaved two-phase buck converter control without external logic |
| MOD | Modulation Control | Three-state input: GND = fOUT/16, floating = fOUT/32, V+ = fOUT/64; tied to OUT2 disables SSFM for deterministic timing |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Qualified | Rated for –40°C to 125°C operation with automotive reliability testing - suitable for engine control, ADAS, and infotainment power rails |
| Rail-to-Rail Outputs | VOH ≥ 4.4V / VOL ≤ 0.2V at 5V supply - ensures robust logic-level compatibility with 3.3V/5V controllers and gate drivers |
| Output Mute at Startup | 64-cycle blanking period - prevents false triggering of downstream regulators during power-rail stabilization |
| SSFM Rate Selection | Three user-selectable modulation rates (fOUT/16, /32, /64) - allows optimization for specific EMI test bandwidths (e.g., CISPR 25) |
| Low Long-Term Drift | 300ppm/√kHr - guarantees frequency stability over 10+ year vehicle lifetimes without recalibration |
Applications
| Automotive Power Management | Industrial DC-DC Converters |
|---|---|
Use Scenario: Synchronizing dual-phase buck converters in 12V/48V hybrid vehicle power distribution units. IC Role / Device Role / Timing Role: LTC6908HS6-1#WTRPBF provides complementary clock signals to two parallel buck controllers, enabling interleaved operation that halves input/output ripple current. Use Value: Reduces EMI filter size by 40% and improves thermal derating margin through balanced phase current sharing. |
Use Scenario: Clocking isolated flyback controllers in industrial PLC power supplies operating in harsh electromagnetic environments. IC Role / Device Role / Timing Role: LTC6908HS6-1#WTRPBF delivers a stable, spread-spectrum clock to primary-side controller ICs, replacing less reliable crystal oscillators subject to mechanical shock. Use Value: Achieves CISPR 32 Class B compliance without shielding enclosures, lowering system BOM cost by $1.20/unit. |
| Portable Medical Equipment | Test & Measurement Instruments |
Use Scenario: Providing low-jitter clock references for battery-powered ultrasound transducer driver modules. IC Role / Device Role / Timing Role: LTC6908HS6-1#WTRPBF generates precisely phased clocks for time-of-flight calculations in portable diagnostic devices with strict power budgets. Use Value: Enables 15% longer battery life versus crystal-based solutions due to 400µA typical quiescent current at 50kHz. |
Use Scenario: Driving high-speed ADC/DAC clock inputs in portable oscilloscope front-ends requiring deterministic jitter performance. IC Role / Device Role / Timing Role: LTC6908HS6-1#WTRPBF operates in non-SSFM mode (MOD tied to OUT2) to deliver ultra-low cycle-to-cycle jitter (<0.5% p-p) for sampling accuracy. Use Value: Maintains ENOB > 12 bits at 10MHz sampling rate without external jitter cleaners or PLLs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable oscillator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si5366-A01A-GM | Programmable I2C clock generator with 0.5ps RMS jitter; requires external EEPROM and configuration firmware. | Supports multi-frequency profiles and dynamic reconfiguration; not suited for simple fixed-frequency use cases. | Select when system-level flexibility outweighs BOM simplicity and cost sensitivity. |
| MAX2620EUA+ | VCO-based oscillator with 20–105MHz range; no integrated SSFM or complementary outputs; higher supply current (2.5mA). | Requires external loop filter and feedback components; lacks automotive qualification and startup mute function. | Choose only if wider frequency range is mandatory and board area permits discrete VCO implementation. |
Compared with Si5366-A01A-GM and MAX2620EUA+, the LTC6908HS6-1#WTRPBF delivers AEC-Q100 qualification, zero-config SSFM, and complementary outputs in a 6-pin TSOT-23-reducing design effort, component count, and validation risk for automotive and industrial power timing.
Availability
LTC6908HS6-1#WTRPBF is available at Aetrix Electronics and suitable for automotive power management, industrial DC-DC converters, and portable medical equipment requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for LTC6908HS6-1#WTRPBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, and automotive markets since 1965.
The LTC6908HS6-1#WTRPBF belongs to Analog Devices' precision timing portfolio, engineered specifically for EMI-sensitive power conversion systems requiring automotive-grade reliability, spread-spectrum capability, and minimal external components.
FAQ
What is the maximum operating temperature for the LTC6908HS6-1#WTRPBF?
The LTC6908HS6-1#WTRPBF is rated for continuous operation from –40°C to +125°C ambient temperature, meeting AEC-Q100 Grade 1 requirements for under-hood automotive applications. This specification is guaranteed across the full voltage range (2.7V–5.5V) and applies to both functional operation and parametric limits such as frequency accuracy and supply current.
How does the MOD pin control spread spectrum modulation on the LTC6908HS6-1#WTRPBF?
The MOD pin on the LTC6908HS6-1#WTRPBF selects SSFM rate via three logic states: grounding enables fOUT/16 modulation, leaving it floating selects fOUT/32, and tying it to V+ sets fOUT/64. Connecting MOD to either OUT1 or OUT2 disables SSFM entirely. The internal PRN generator and 1-pole LPF ensure smooth frequency transitions compatible with switching regulator bandwidths.
Can the LTC6908HS6-1#WTRPBF drive switching regulator SYNC pins directly?
Yes, the LTC6908HS6-1#WTRPBF outputs are rail-to-rail CMOS-compatible and can directly drive SYNC, PLLIN, or EXTCLK pins of Analog Devices switching regulators (e.g., LTC3418, LT8640S) and most industry-standard controllers. Its 50% duty cycle, fast rise/fall times (6ns/5ns at 5V), and 5kΩ/5pF load drive capability eliminate need for level shifters or buffers.
What is the frequency-setting resistor range for ±2% accuracy at 5V supply?
For ≤±2% frequency accuracy at V+ = 5V, the LTC6908HS6-1#WTRPBF requires an RSET value between 20kΩ and 400kΩ. At 100kΩ, this yields fOUT ≈ 1MHz with guaranteed error within ±2% over –40°C to 125°C. Values outside this range increase error: RSET = 10kΩ gives ≤±3.5% at 5V, while RSET = 2MΩ extends range to 50kHz but increases error to ≤±4.5%.
Does the LTC6908HS6-1#WTRPBF require external bypass capacitors?
Yes, the LTC6908HS6-1#WTRPBF requires a 0.1µF ceramic capacitor placed as close as possible between the V+ and GND pins to suppress supply noise and ensure stable oscillation. Additional bulk capacitance (e.g., 10µF tantalum) is recommended on the main 5V rail feeding V+, especially in automotive environments with high transient noise.
LTC6908HS6-1#WTRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Oscillator, Silicon
- Count:
- -
- Frequency:
- 50kHz ~ 10MHz
- Voltage - Supply:
- 2.7V ~ 5.5V
- Current - Supply:
- 1.25 mA
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- TSOT-23-6
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC6908HS6-1#WTRPBF FAQ
1.How can I place an order for LTC6908HS6-1#WTRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6908HS6-1#WTRPBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LTC6908HS6-1#WTRPBF reliable?
The price and inventory of LTC6908HS6-1#WTRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6908HS6-1#WTRPBF is usually 5 days.
3.What payment methods are accepted for LTC6908HS6-1#WTRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6908HS6-1#WTRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6908HS6-1#WTRPBF?
LTC6908HS6-1#WTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6908HS6-1#WTRPBF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LTC6908HS6-1#WTRPBF?
For technical support, including LTC6908HS6-1#WTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6908HS6-1#WTRPBF requirements.
6.How does Aetrix verify that LTC6908HS6-1#WTRPBF is sourced from the original manufacturer or authorized distributors?
All LTC6908HS6-1#WTRPBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LTC6908HS6-1#WTRPBF meets industry standards.
7.What is the process for return or replacement of LTC6908HS6-1#WTRPBF?
All LTC6908HS6-1#WTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6908HS6-1#WTRPBF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LTC6908HS6-1#WTRPBF part is unused and in its original packaging.
Return procedure for LTC6908HS6-1#WTRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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